There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What question can you never answer yes to?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

If 21x = 79x, what is the value of x?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98